When the two fabric pieces bget joined together in stitching, the product needs equal strength at the point of joint as the original fabric. The seam strength of fabric enables the durability of a garment and other product. The sewed seam strength of the fabric is a very important property of a fabric. A fabric using in garment should have better-sewed seam strength because there are always too chances of slippage of fabric at stitching joints in the garments. When the fabric to be using in garments comes under stretching load during routine outdoor activities, and as the stretching load increases, the fabric on the stitching joints also starts to slip if it has poor sewed seam strength.
The yarn count, construction of the fabric and GSM of the directly affect the sewed seam strength of the fabric. You can understand the influence of these fabric parameters with the help of the following examples:
The weave of a fabric plays a very important role in the sewed seam strength of the fabric. The weave having more number of interlacing points in repeat always gives better-sewed seam strength because these interlacing points provide an adhesive force between warp and weft of the fabric. Since we know that the plain weave has a maximum possible number of interlacing points in repeat, therefore plain weave poses maximum sewed seam strength among all weaves.
The type of material influences the sewed seam strength up to some extent. The spun yarn has better-sewed seam strength than filament yarn. The natural fibres pose better-sewed seam strength than man-made fibres.